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-rw-r--r--HACKING9
1 files changed, 5 insertions, 4 deletions
diff --git a/HACKING b/HACKING
index 471cf1d197..dddd617a6b 100644
--- a/HACKING
+++ b/HACKING
@@ -91,10 +91,11 @@ emulators.
4. String manipulation
-Do not use the strncpy function. According to the man page, it does
-*not* guarantee a NULL-terminated buffer, which makes it extremely dangerous
-to use. Instead, use functionally equivalent function:
-void pstrcpy(char *buf, int buf_size, const char *str)
+Do not use the strncpy function. As mentioned in the man page, it does *not*
+guarantee a NULL-terminated buffer, which makes it extremely dangerous to use.
+It also zeros trailing destination bytes out to the specified length. Instead,
+use this similar function when possible, but note its different signature:
+void pstrcpy(char *dest, int dest_buf_size, const char *src)
Don't use strcat because it can't check for buffer overflows, but:
char *pstrcat(char *buf, int buf_size, const char *s)